Intel Core Ultra 7 265K vs Intel Core Ultra 7 270HX Plus Comparison

The Verdict

The data separates these two processors cleanly by use case. The Intel Core Ultra 7 265K wins 14 of the 17 recorded head-to-head benchmark comparisons, while the Intel Core Ultra 7 270HX Plus takes three. The 265K is the desktop part, scoring in the 94th percentile of all CPUs in the database with an average benchmark score of 70,879. The 270HX Plus is the mobile part, sitting in the 93rd percentile with an average score of 61,834. That is a 9,045-point gap in average score, roughly 14.6% in favor of the desktop chip.

The 265K delivers its largest margins in PassMark extended instructions (38.3% ahead), data compression (35% ahead), and random string sorting (32.9% ahead). The 270HX Plus counters with a dominant Cinebench R23 single-core result, scoring 5,917 versus 2,020, a 65.9% advantage, and it also leads in Cinebench R23 multi-core (41,913 versus 35,850, a 14.5% edge) and PassMark physics (3,843 versus 3,731, a 2.9% edge). The pattern suggests the 270HX Plus has a different performance profile in the Cinebench R23 workload, while the 265K controls the majority of PassMark and older Cinebench tests.

Users who need the broader set of compute workloads should select the 265K. Users who prioritize the specific Cinebench R23 single-thread scenario in a mobile package should select the 270HX Plus. The 265K also carries a launch MSRP of $394, while the 270HX Plus has no recorded launch MSRP.

Architecture Differences

Both processors share the same fundamental silicon. Each uses a 3 nm process node from TSMC, with 17,800 million transistors on a 243 mm² die. Both belong to the Core Ultra Series 2 family and carry 20 cores and 20 threads.

The 265K is built on the Arrow Lake architecture with the Arrow Lake-S codename, belonging to the Ultra 7 (Arrow Lake) generation. It uses Intel Socket 1851 and targets the desktop market segment. The 270HX Plus uses the Arrow Lake-HX Refresh codename and belongs to the Ultra 7 (Arrow Lake-HX) generation. It uses Intel BGA 2114 and targets the mobile market segment. The 265K was released on 2024-10-23, while the 270HX Plus has a later release date of 2026-03-16.

Cache configurations match exactly. Both have 192 KB of L1 per core, 3 MB of L2 per core, and 30 MB of shared L3. Memory support is also identical: DDR5, dual-channel, with 102.4 GB/s of bandwidth. Both use PCIe Gen 5 with 20 CPU lanes and integrate Arc Xe-LPG Graphics with 64 execution units.

The key architectural difference beyond socket and segment is clock behavior. The 265K has a base clock of 3.90 GHz and a boost clock of 5.50 GHz. The 270HX Plus has a base clock of 2.40 GHz and a boost clock of 5.30 GHz. The 265K is rated at 125 W TDP, while the 270HX Plus is rated at 55 W TDP. The desktop part runs at higher clocks and consumes more power; the mobile part operates at lower clocks and far lower power.

ECC memory support differs. The 265K supports ECC, while the 270HX Plus does not. Both have unlocked multipliers, so overclocking is possible on both platforms, though the mobile BGA package limits practical application.

Head-to-Head Benchmarks

The 265K dominates the Cinebench R15 and R20 suites. In Cinebench R15 multi-core, it scores 5,020 versus 4,224, an 18.8% margin. The single-core result follows the same pattern: 708 versus 596, also 18.8%. Cinebench R20 multi-core shows 20,918 versus 17,603, and single-core shows 2,953 versus 2,485, both at 18.8% again.

Cinebench R23 flips the script. The 270HX Plus scores 41,913 in multi-core against the 265K's 35,850, a 14.5% advantage. The single-core result is far more extreme: 5,917 versus 2,020, which is a 65.9% margin in favor of the mobile chip. This is the single largest delta in the entire comparison and is unusual given the 265K's higher boost clock.

PassMark results mostly favor the 265K. Data compression shows 665,554 versus 493,179, a 35% lead. Data encryption shows 48,246 versus 37,813, a 27.6% lead. Extended instructions show 54,333 versus 39,283, a 38.3% lead. Find prime numbers is close at 491 versus 482, only 1.9% apart. Floating point math favors the 265K at 189,629 versus 163,567, a 15.9% margin. Integer math shows 143,242 versus 122,449, a 17% margin. Multi-threaded performance is 58,594 versus 48,270, a 21.4% lead. Random string sorting shows 79,752 versus 60,020, a 32.9% lead. Single-thread performance is 4,928 versus 4,764, a 3.4% margin.

The 270HX Plus wins only PassMark physics (3,843 versus 3,731, a 2.9% lead) in addition to its two Cinebench R23 victories. The physics result is the closest margin of any test in the comparison.

The nearest rivals in the database provide context. The 265K sits near the Intel Xeon 6511P (0.2% behind), the Intel Xeon Platinum 8270 (0.7% behind), the Intel Core i7-14700KF (1% ahead), and the AMD Ryzen 7 9700F (1.3% ahead). The 270HX Plus is effectively tied with the Intel Core i9-13900KF (0% delta), the Intel Core i9-13900K (0.1% ahead), the Intel Core i9-13900T (0.2% ahead), and the Intel Xeon 636 (0.8% ahead). The mobile part matches a previous-generation flagship desktop CPU in average score, while the desktop part trades blows with current server and desktop parts.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core Ultra 7 265K has an average benchmark score of 70,879, while the Intel Core Ultra 7 270HX Plus has 61,834. The 265K also holds a 94th percentile ranking versus the 270HX Plus's 93rd percentile.

Q: Why does the 270HX Plus win Cinebench R23 single-core by such a large margin?

A: The recorded data shows the 270HX Plus scoring 5,917 in Cinebench R23 single-core versus 2,020 for the 265K, a 65.9% delta. The database does not attribute this to any specific architectural feature, but the 270HX Plus's codename is Arrow Lake-HX Refresh, indicating a revised mobile variant.

Q: Do both processors have the same core and thread counts?

A: Yes. Both have 20 cores and 20 threads. Both also share the same L1 cache of 192 KB per core, L2 cache of 3 MB per core, and L3 cache of 30 MB shared.

Q: What is the TDP difference?

A: The 265K is rated at 125 W TDP, and the 270HX Plus is rated at 55 W TDP. The 265K has a base clock of 3.90 GHz and boost of 5.50 GHz; the 270HX Plus has a base clock of 2.40 GHz and boost of 5.30 GHz.

Q: Which processor supports ECC memory?

A: Only the 265K supports ECC memory. The 270HX Plus does not list ECC support in the database.

Q: How many benchmark comparisons does each processor win?

A: The 265K wins 14 of the 17 head-to-head comparisons. The 270HX Plus wins three: Cinebench R23 multi-core, Cinebench R23 single-core, and PassMark physics.

Where Each One Wins

The 265K is the choice for workloads that resemble the PassMark suite. It leads in data compression by 35%, data encryption by 27.6%, extended instructions by 38.3%, floating point math by 15.9%, integer math by 17%, multi-threaded performance by 21.4%, random string sorting by 32.9%, and single-thread performance by 3.4%. It also wins all four Cinebench R15 and R20 tests by a uniform 18.8% margin. Its 94th percentile ranking and average score of 70,879 place it among server-class Xeon parts and close to the Core i7-14700KF.

The 270HX Plus wins the Cinebench R23 tests, which is notable because those are the only Cinebench results where it does not trail. The R23 multi-core score of 41,913 exceeds the 265K's 35,850 by 14.5%, and the R23 single-core score of 5,917 dwarfs the 265K's 2,020. It also edges out the 265K in PassMark physics, 3,843 versus 3,731. Its average score of 61,834 places it at parity with the Core i9-13900KF and Core i9-13900K, which is a strong result for a 55 W mobile part.

Specification Differences

| Specification | Intel Core Ultra 7 265K | Intel Core Ultra 7 270HX Plus |

| --- | --- | --- |

| Market segment | Desktop | Mobile |

| Socket | Intel Socket 1851 | Intel BGA 2114 |

| Codename | Arrow Lake-S | Arrow Lake-HX Refresh |

| Generation | Ultra 7 (Arrow Lake) | Ultra 7 (Arrow Lake-HX) |

| Base clock | 3.90 GHz | 2.40 GHz |

| Boost clock | 5.50 GHz | 5.30 GHz |

| TDP | 125 W | 55 W |

| ECC memory | Yes | No |

| Release date | 2024-10-23 | 2026-03-16 |

| Launch MSRP | $394 | Not recorded |

| Part number | SRQCW | SADST |

All other recorded specifications match. Both use TSMC 3 nm, have 17,800 million transistors, a 243 mm² die, 20 cores, 20 threads, 192 KB L1 per core, 3 MB L2 per core, 30 MB shared L3, DDR5 dual-channel memory at 102.4 GB/s, PCIe Gen 5 with 20 CPU lanes, Arc Xe-LPG Graphics with 64 execution units, and unlocked multipliers. Both are actively in production.